Cheap Proportioning Valve Upgrade - Page 2 - Third Generation F-Body Message Boards

Go Back  Third Generation F-Body Message Boards > Tech Boards > Brakes
Reload this Page >

Cheap Proportioning Valve Upgrade

Brakes Looking to upgrade or get the most out of what you have stock? All brake discussions go here!

Cheap Proportioning Valve Upgrade

Old 04-27-2011, 03:07 PM
  #51  
Member
iTrader: (12)
 
Join Date: Sep 2009
Location: Norwalk, CA
Posts: 452
Car: 1983 Z-28
Engine: 5.7 L
Transmission: T-5
Re: Cheap Proportioning Valve Upgrade

thanks yes that is very helpful thanks......
83C_CamAroZ28 is offline  
Old 06-26-2011, 05:34 PM
  #52  
Member
 
Napster134's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 394
Car: 1991 Pontiac Firebird
Engine: 355 TBI
Transmission: 7004R
Axle/Gears: 3.27/42 ?
Re: Cheap Proportioning Valve Upgrade

I bought a few springs from Grainger. Still haven't had a chance to try out my brakes, I did a 9bolt swap with PBR's. Going to try them out today and hope they work out.

In case anyone was looking for some extra springs, I bought both of the 1NCF2 and 1NCR5 spring packs since I didn't know which would work best.

(Shiny ones) 1NCF2= 22lbs
(Goldish ones)1NCR5= 19lbs

Paid 20$ with shipping and all so if anyone wants one or a few let me know.
Attached Thumbnails Cheap Proportioning Valve Upgrade-p0001_260611_resized2011626142643.jpg  
Napster134 is offline  
Old 06-26-2011, 05:38 PM
  #53  
Member
 
Napster134's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 394
Car: 1991 Pontiac Firebird
Engine: 355 TBI
Transmission: 7004R
Axle/Gears: 3.27/42 ?
Re: Cheap Proportioning Valve Upgrade

Glad I found this before I bought a new prop. valve. Should be a sticky or something lol, much cheaper and easier than buying a whole new proportioning valve. Took me about 2 minutes to install the spring. Hopefully they work.
Napster134 is offline  
Old 06-27-2011, 09:00 AM
  #54  
Supreme Member
iTrader: (4)
 
1ADan's Avatar
 
Join Date: Mar 2009
Location: Pepperell, MA
Posts: 3,079
Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Napster134 View Post
I bought a few springs from Grainger. Still haven't had a chance to try out my brakes, I did a 9bolt swap with PBR's. Going to try them out today and hope they work out.

In case anyone was looking for some extra springs, I bought both of the 1NCF2 and 1NCR5 spring packs since I didn't know which would work best.

(Shiny ones) 1NCF2= 22lbs
(Goldish ones)1NCR5= 19lbs

Paid 20$ with shipping and all so if anyone wants one or a few let me know.
i'd be in for one of each, let me know!
1ADan is offline  
Old 06-27-2011, 09:26 AM
  #55  
Member
 
ikeepitreelz's Avatar
 
Join Date: Dec 2007
Location: NYC
Posts: 136
Car: 1988 gta-
Engine: 383 tpi
Transmission: 700 r-4
Re: Cheap Proportioning Valve Upgrade

Originally Posted by 1ADan View Post
i'd be in for one of each, let me know!
I installed mines 2 months ago and i could definitely feel the difference in rear braking power, you just have to be careful on wet ground i had to step on the brakes pretty hard coming on a soft turn and the rears locked and the car started to slip so i let go to correct and stop the sliding....fun fun fun . but overall a very inexpensive good upgrade, Hopefully in the near future i would like to add the 1LE kit from SSBC Brakes but its kinda pricy.
ikeepitreelz is offline  
Old 06-28-2011, 04:51 AM
  #56  
Member
 
Napster134's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 394
Car: 1991 Pontiac Firebird
Engine: 355 TBI
Transmission: 7004R
Axle/Gears: 3.27/42 ?
Re: Cheap Proportioning Valve Upgrade

Originally Posted by 1ADan View Post
i'd be in for one of each, let me know!
Sure, just PM me with details. I quoted someone 12$ w/ shipping for one of each. So if you would like one of each as well then ill drop the price to 9$ for the both of you. Since it would save me a trip to the post office.
Napster134 is offline  
Old 06-28-2011, 04:53 AM
  #57  
Member
 
Napster134's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 394
Car: 1991 Pontiac Firebird
Engine: 355 TBI
Transmission: 7004R
Axle/Gears: 3.27/42 ?
Re: Cheap Proportioning Valve Upgrade

Although I would really like to test them out before sending them out. I'm having problems with my brake system, so my car may not be the best to try them out on.

I test drove it after installing the 22lb spring and did not feel much of a difference at all.

I'm going to jack up my rear tomorrow and put it in gear to see if my brakes lock (unlike before)
Napster134 is offline  
Old 06-28-2011, 08:15 AM
  #58  
Member
 
ikeepitreelz's Avatar
 
Join Date: Dec 2007
Location: NYC
Posts: 136
Car: 1988 gta-
Engine: 383 tpi
Transmission: 700 r-4
Re: Cheap Proportioning Valve Upgrade

Make sure you bleed the system, My rear brakes lock up NOW as before they kept spinning while i had the car jacked up in the air.also, i feel better performance when stomping on the pedal from high speed. Grainger sells the springs,they come five per bag for $5.98 a cheap upgrade. here is the link.

http://www.grainger.com/Grainger/wwg...N=0&sst=subset
ikeepitreelz is offline  
Old 06-28-2011, 08:49 AM
  #59  
Supreme Member
iTrader: (8)
 
Join Date: Sep 1999
Location: NJ
Posts: 2,708
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Napster134 View Post
Sure, just PM me with details. I quoted someone 12$ w/ shipping for one of each. So if you would like one of each as well then ill drop the price to 9$ for the both of you. Since it would save me a trip to the post office.
For $9 I will take a set too, sending PM
scooter is offline  
Old 06-28-2011, 01:36 PM
  #60  
Member
 
Napster134's Avatar
 
Join Date: Jun 2009
Location: California
Posts: 394
Car: 1991 Pontiac Firebird
Engine: 355 TBI
Transmission: 7004R
Axle/Gears: 3.27/42 ?
Re: Cheap Proportioning Valve Upgrade

oh man I should just set up a business selling these things lol.... well see, anyone can buy the springs off of Grainger but it makes you go through a whole bunch of crap since it seems to be a commercially based thing? I used my dads real estate business info to sign myself up lol....
Napster134 is offline  
Old 06-28-2011, 01:54 PM
  #61  
Supreme Member
iTrader: (25)
 
Join Date: Feb 2006
Location: Manteca,California. Nor Cal.
Posts: 7,260
Car: SOLD IT. Mopar guy only now.
Engine: gone
Transmission: gone
Axle/Gears: gone
Re: Cheap Proportioning Valve Upgrade

is this mod only far cars with rear discs or would it work on drum cars too? or is thier a differnt spring for drum cars?
UnderCover89TBI is offline  
Old 06-28-2011, 09:54 PM
  #62  
Junior Member
 
Join Date: Jun 2011
Location: Ohio
Posts: 12
Car: 1989 IROC
Engine: 5.7 TPI 3"Borla exh
Transmission: 700R4 man valve body BM SHIFTER
Axle/Gears: 3.23 posi
Re: Cheap Proportioning Valve Upgrade

Hello First time poster here.
I have enjoyed the site and gathered alot of info from all of you.Thanks

Could one of you with some machining skills fab adjustable screw to fit in valve to preload spring thereby making adjustable valve?
just a thought
astoneburner is offline  
Old 06-28-2011, 10:30 PM
  #63  
Supreme Member
Thread Starter
iTrader: (3)
 
1989GTATransAm's Avatar
 
Join Date: Sep 2003
Location: Cypress, California
Posts: 6,857
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: Cheap Proportioning Valve Upgrade

"Could one of you with some machining skills fab adjustable screw to fit in valve to preload spring thereby making adjustable valve?
just a thought"

Yes, it has been done and does work. However changing the spring pretty much accomplishes the same thing for a lot less money.
1989GTATransAm is offline  
Old 07-02-2011, 08:03 AM
  #64  
Member
 
Join Date: Mar 2007
Location: Slinger WI
Posts: 177
Car: 55 chevy Belair & 86IROC Z
Engine: 350 in 55 86IROC Z LT1
Transmission: 55 4speed IROC Z4L60e
Axle/Gears: 12 bolt 410 in55 and 342 inCamaro
Re: Cheap Proportioning Valve Upgrade

do you have any springs and how much are they 53086 I doing a rear disc brakes on a86 IROC Z will the rear rotor from a 4th gen fit and are they bigger and better ??
55ChevyMan is offline  
Old 07-02-2011, 08:16 AM
  #65  
Member
 
Join Date: Mar 2007
Location: Slinger WI
Posts: 177
Car: 55 chevy Belair & 86IROC Z
Engine: 350 in 55 86IROC Z LT1
Transmission: 55 4speed IROC Z4L60e
Axle/Gears: 12 bolt 410 in55 and 342 inCamaro
Re: Cheap Proportioning Valve Upgrade

do you still have the spring's for sale are could I just go say a hardware store and find them ? 53086 and will going to a 4th gen rotor help and will they fit ?? working on a 86 IROC Z Camaro
55ChevyMan is offline  
Old 07-02-2011, 08:37 AM
  #66  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by 55ChevyMan View Post
will going to a 4th gen rotor help and will they fit ?? working on a 86 IROC Z Camaro
You can't simply exchange a fourthgen rotor for a thirdgen. The swap must be complete, to include backing plates--if so designed--calipers, rotors, parking brake cables and combination valve. The fourthgen LT1 (93-97), which are much like the 89-92 version, and the LS1 swap have been done many times, so our site has a mountain of info. You can start here:

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

https://www.thirdgen.org/forums/tran...-10-bolts.html

JamesC
JamesC is offline  
Old 09-07-2011, 08:58 PM
  #67  
Member
iTrader: (1)
 
hoogiesngrinder's Avatar
 
Join Date: Jul 2005
Location: Lowell, MI
Posts: 141
Car: 1989 Camaro IROC-Z Convt.
Engine: 355
Transmission: T5
Axle/Gears: Zexel Torsen 3.42
Re: Cheap Proportioning Valve Upgrade

I know this thread is a little old, but I went to install my 90-92 proportioning valve for PBR rear discs (so I was told) on my 89 Iroc-z convertible (disc/drum) and all the threads were different. Well, all but one I should say.

I removed the internals from both and swapped them around. I took a picture in the mean time because I remembered someone asked if just the spring could be changed for the disc/drum valves. Here is what I found: Drum internals on the left, disc on the right.


The anodized parts are different, as well as the spring ID and the perch in the cap. If you could find a stiffer spring that match the same dimensions I don't see why it wouldn't work. Hope this helps.
hoogiesngrinder is offline  
Old 09-09-2011, 08:21 PM
  #68  
Senior Member
iTrader: (8)
 
Join Date: Sep 2008
Location: San Fernando valley-Lancaster,CA
Posts: 681
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Cheap Proportioning Valve Upgrade

so for this to work on my 86 i have to get a 1989 prop valve and then buy the spring kits and also what would be the best spring since i just upgraded to 1LE front and the '89 9 bolt J65 PBR rears with the 11" disk
DiabloWS6 is offline  
Old 09-09-2011, 09:56 PM
  #69  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by DiabloWS6 View Post
so for this to work on my 86 i have to get a 1989 prop valve and then buy the spring kits and also what would be the best spring since i just upgraded to 1LE front and the '89 9 bolt J65 PBR rears with the 11" disk
I use the first design 1LE valve for my 1LE set-up, front and rear, without spring modification, and the braking power is first rate.
JamesC is offline  
Old 09-10-2011, 01:19 AM
  #70  
Senior Member
iTrader: (8)
 
Join Date: Sep 2008
Location: San Fernando valley-Lancaster,CA
Posts: 681
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Cheap Proportioning Valve Upgrade

but isnt the first design 1LE hard to come by
DiabloWS6 is offline  
Old 09-10-2011, 07:24 AM
  #71  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by DiabloWS6 View Post
but isnt the first design 1LE hard to come by
Ed's a bit slow right now, but....

http://www.flynbye.com/catalog/i40.html

JamesC
JamesC is offline  
Old 09-10-2011, 09:17 PM
  #72  
Member
iTrader: (1)
 
hoogiesngrinder's Avatar
 
Join Date: Jul 2005
Location: Lowell, MI
Posts: 141
Car: 1989 Camaro IROC-Z Convt.
Engine: 355
Transmission: T5
Axle/Gears: Zexel Torsen 3.42
Re: Cheap Proportioning Valve Upgrade

I don't want to take business away from Ed, but I'm curious to know the difference between:
'82-89 stock and '82-89 1LE/J65 valves
'90-92 stock and '90-92 1LE/J65 valves
'82-89 1LE/J65 and '90-92 1LE/J65 valves

I assume the blocks themselves are the same, so just a different vavle and spring? I assume the front metering is different as well so there isn't a delay on the fronts.

I used the stock internals out of a '90-92 disc/disc valve and put them in my '89 disc/drum vavle. I have LS1 fronts and a '97 rear, so the rear calipers are the same PBR's AFAIK. Not sure when I'll have the new setup running in order to test this out.
hoogiesngrinder is offline  
Old 09-10-2011, 09:47 PM
  #73  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by hoogiesngrinder View Post
...I'm curious to know the difference between:
'82-89 stock and '82-89 1LE/J65 valves
'90-92 stock and '90-92 1LE/J65 valves
'82-89 1LE/J65 and '90-92 1LE/J65 valves
All four-wheel disc cars are J65. All 89+ cars have the so-called performance/1LE rear disc set-up.

82-88 standard disc brakes (10.5" discs and Delco-Moraine iron calipers).
89-92 performance/1LE disc brakes (11.7" discs and PBR alum calipers). Because of thread differences, there are two valves, a first design which fits 84 to early 89 cars (used when retro fitting) and a second design which fits late 89 though 92 cars.

What the internal differences might be, I can't say.

JamesC
JamesC is offline  
Old 09-11-2011, 05:35 PM
  #74  
Senior Member
iTrader: (8)
 
Join Date: Sep 2008
Location: San Fernando valley-Lancaster,CA
Posts: 681
Car: '86 TRANS-AM WS6
Engine: 1989 355 TPI L98
Transmission: TH700R-4
Axle/Gears: BorgWarner 9 bolt/ 3.27
Re: Cheap Proportioning Valve Upgrade

@james im sorry i guess i over looked it de de de lol
DiabloWS6 is offline  
Old 09-13-2011, 02:42 AM
  #75  
Member
iTrader: (1)
 
85Z28NOS's Avatar
 
Join Date: May 2010
Location: TEXAS
Posts: 383
Car: 85 Z28 / 90 Firebird
Engine: 350 HSR / 3.1
Transmission: T56 / 700R4
Axle/Gears: 3.73/3.42
Re: Cheap Proportioning Valve Upgrade

Looked up the springs in the MSC catalog and figured I would add that part number to the list here
06812184(30.69 lbs/inch)

Also something else that should be noted is that the stainless steel versions have a different spring rating than the regular one. Stainless steel part number
03308632(25.56 lbs/inch)
85Z28NOS is offline  
Old 09-27-2011, 03:46 PM
  #76  
Junior Member
 
Join Date: Mar 2005
Location: BC
Posts: 28
Car: 88 IROC-Z
Engine: 5.7 TPI
Transmission: T56
Axle/Gears: Moser 12bolt 4.10s
Re: Cheap Proportioning Valve Upgrade

Anyone have an extra spring they'd like to sell me? Grainger here in Canada doesnt carry them and I cant order them from the states...

Thanks
geoffz28 is offline  
Old 09-30-2011, 01:17 AM
  #77  
Member
iTrader: (12)
 
Join Date: Sep 2009
Location: Norwalk, CA
Posts: 452
Car: 1983 Z-28
Engine: 5.7 L
Transmission: T-5
Re: Cheap Proportioning Valve Upgrade

i have sum...give me ur info..i have the 19.11lbs..
83C_CamAroZ28 is offline  
Old 10-25-2011, 11:52 PM
  #78  
Member
iTrader: (1)
 
88camaroscv6's Avatar
 
Join Date: Oct 2008
Location: Long Island, NY
Posts: 135
Car: 1989 Formula, 1988 Camaro
Engine: Vortec 350 TPI, 2.8 V6
Transmission: 700r4, 700r4
Axle/Gears: 4th Gen 3.43 Posi, 3.43 Open
Re: Cheap Proportioning Valve Upgrade

ok so i read this whole thing and i want to know which spring i should buy,
(Shiny ones) 1NCF2= 22lbs
(Goldish ones)1NCR5= 19lbs)

i didnt see where anyone specified which spring they used for the 4th gen rear PBR calipers, my car was originally a drum rear its an 89 Formula, so which is the correct spring for my application?
88camaroscv6 is offline  
Old 11-02-2011, 08:20 PM
  #79  
Supreme Member
iTrader: (9)
 
88fastgta's Avatar
 
Join Date: Mar 2007
Location: Raleigh, NC
Posts: 1,804
Car: 1988 Flame Red Trans am GTA
Engine: Forged 355 4 Bolt, FIRST TPI
Transmission: 700r4
Axle/Gears: ls1 torsen 3.42 gear
Re: Cheap Proportioning Valve Upgrade

can i put this spring in a factory 88 car with disk brakes... i have a 88 gta.... will i need to bleed the brakes....
88fastgta is offline  
Old 05-23-2012, 07:32 PM
  #80  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Has anyone tried this on an '82-'83 prop valve yet?
chazman is offline  
Old 05-23-2012, 10:52 PM
  #81  
Member
 
82z28 wrencher's Avatar
 
Join Date: Sep 2009
Location: bloomington il
Posts: 150
Car: 84 Trans Am
Engine: 350
Transmission: 700r4
Axle/Gears: 10 bolt 3.73 factory
Re: Cheap Proportioning Valve Upgrade

no but id sure like to know if it would work i got ls1 rear brakes and will be in need of a adjustment. Worst case u could pickup a drum al port valve and convert it to disk. would it be cheaper than buying new? i know the threads would be diffrent but u could just find some adapter fittings

Last edited by 82z28 wrencher; 05-23-2012 at 10:56 PM.
82z28 wrencher is offline  
Old 05-24-2012, 05:22 AM
  #82  
Member
iTrader: (1)
 
Arvizu9618's Avatar
 
Join Date: Sep 2008
Location: Phoenix AZ
Posts: 207
Car: 1985 IROC-Z Clone
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.23 Rear Disc
Re: Cheap Proportioning Valve Upgrade

Originally Posted by 88fastgta View Post
can i put this spring in a factory 88 car with disk brakes... i have a 88 gta.... will i need to bleed the brakes....
I put one in a stock valve from a 1987 Trans Am, BTW you'l always have to bleed if you mess with brake lines/connections.

Originally Posted by chazman View Post
Has anyone tried this on an '82-'83 prop valve yet?
I did this mod also on my 1985 Z28 with the old school cast iron valve, works like a champ!

Last edited by Arvizu9618; 05-27-2012 at 01:04 AM. Reason: Sold two springs to Jari in Finland this morning
Arvizu9618 is offline  
Old 05-24-2012, 07:47 AM
  #83  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
I did this mod also on my 1985 Z28 with the old school cast iron valve, works like a champ!
Interesting. Did you test the valve/spring in some manner, or did you reply on the seat of your pants?

JamesC
JamesC is offline  
Old 05-24-2012, 08:43 AM
  #84  
Member
iTrader: (1)
 
Arvizu9618's Avatar
 
Join Date: Sep 2008
Location: Phoenix AZ
Posts: 207
Car: 1985 IROC-Z Clone
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.23 Rear Disc
Re: Cheap Proportioning Valve Upgrade

Brakes aren't spongy any more, feels like pressure is building, brake light is now off...anything else?
Arvizu9618 is offline  
Old 05-24-2012, 09:19 AM
  #85  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
...anything else?
It would be interesting to know how various springs affect bias.

Ed Miller furnishes the mod as seen below. What his modification(s) is would be also be interesting to know.

http://www.flynbye.com/catalog/i160.html

Best of luck with your ride.

JamesC
JamesC is offline  
Old 05-24-2012, 09:22 AM
  #86  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
I've got one left of the 1NCF2's for sale $2 Shipped PAypal is: [email protected]***.net



I put one in a stock valve from a 1987 Trans Am, Currently listed on ebay under Alek9618, BTW you'l always have to bleed if you mess with brake lines/connections.



I did this mod also on my 1985 Z28 with the old school cast iron valve, works like a champ!

The '85 and '83 prop valves are a different design, no?
chazman is offline  
Old 05-24-2012, 09:29 AM
  #87  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by chazman View Post
The '85 and '83 prop valves are a different design, no?
I've read about and seen the old-style valves as late as 85. Somewhere in there they went from SAE to metric. The physical design of the iron and alum valves is a bit different.

JamesC

Last edited by JamesC; 05-24-2012 at 09:33 AM.
JamesC is offline  
Old 05-24-2012, 09:36 AM
  #88  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Originally Posted by JamesC View Post
I've read about and seen the old-style valves as late as 85. Somewhere in there they went from SAE to metric. The physical design of the iron and alum valves is a bit different.

JamesC
Would the spring mod, give the same effect, regardless?
chazman is offline  
Old 05-24-2012, 11:14 AM
  #89  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by chazman View Post
Would the spring mod, give the same effect, regardless?
Can't imagine why not. Staff Sargent Arvizu seems happy enough. Hopefully, he'll chime in with more info.

JamesC
JamesC is offline  
Old 05-24-2012, 11:32 AM
  #90  
Member
iTrader: (1)
 
Arvizu9618's Avatar
 
Join Date: Sep 2008
Location: Phoenix AZ
Posts: 207
Car: 1985 IROC-Z Clone
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.23 Rear Disc
Re: Cheap Proportioning Valve Upgrade

Mod works for me, that's all I can add

I'm confident Jari in Finland will say the same when he gets the springs I just mailed him.

BTW, I'm a retired SSgt, please don't thank me, it was my privilege to serve

Last edited by Arvizu9618; 05-24-2012 at 11:37 AM.
Arvizu9618 is offline  
Old 05-24-2012, 12:11 PM
  #91  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

BTW, externally, the PV on my '83 and '85 look the same, except that the '83 is cast iron and the '85 looks like it's aluminum.

Can someone show me a picture of which orafice the spring goes into? I'm assuming the front one with the brake line attached to it?
chazman is offline  
Old 05-24-2012, 12:35 PM
  #92  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by chazman View Post
BTW, externally, the PV on my '83 and '85 look the same, except that the '83 is cast iron and the '85 looks like it's aluminum.
On the old style, a brake line goes into the front (nose) of the valve, on the new style the line goes underneath the valve. Pics of the new style below.

JamesC
Attached Thumbnails Cheap Proportioning Valve Upgrade-img_0511.jpg   Cheap Proportioning Valve Upgrade-img_0512.jpg  

Last edited by JamesC; 05-24-2012 at 12:42 PM.
JamesC is offline  
Old 05-24-2012, 12:41 PM
  #93  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Originally Posted by JamesC View Post
On the old style, a brake line goes into the front (nose) of the valve, on the new style the line goes underneath the valve.

JamesC
Where would the new spring go on the old style?
chazman is offline  
Old 05-24-2012, 01:36 PM
  #94  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Originally Posted by JamesC View Post
On the old style, a brake line goes into the front (nose) of the valve, on the new style the line goes underneath the valve. Pics of the new style below.

JamesC
Yup, that looks like the one on my '89. Both my '83 and '85 have the less blocky looking old style - like this:



My '83 looks exactly like the above pic, my '85 does as well, except the '85 appears to be made of aluminum.

Last edited by chazman; 05-24-2012 at 01:52 PM.
chazman is offline  
Old 05-24-2012, 02:09 PM
  #95  
Member
iTrader: (1)
 
Arvizu9618's Avatar
 
Join Date: Sep 2008
Location: Phoenix AZ
Posts: 207
Car: 1985 IROC-Z Clone
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.23 Rear Disc
Re: Cheap Proportioning Valve Upgrade

Originally Posted by chazman View Post
Where would the new spring go on the old style?
It would go inside the vertical chamber. The circled portion of your pic. The plug/fitting req's a 3/4" wrench.

Arvizu9618 is offline  
Old 05-24-2012, 06:20 PM
  #96  
Supreme Member
iTrader: (4)
 
chazman's Avatar
 
Join Date: Dec 2001
Location: Chicagoland
Posts: 7,359
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
It would go inside the vertical chamber. The circled portion of your pic. The plug/fitting req's a 3/4" wrench.

Awesome! Thanks man. Got any more springs that you can sell?

Last edited by chazman; 05-24-2012 at 06:42 PM.
chazman is offline  
Old 05-24-2012, 11:14 PM
  #97  
Member
iTrader: (1)
 
Arvizu9618's Avatar
 
Join Date: Sep 2008
Location: Phoenix AZ
Posts: 207
Car: 1985 IROC-Z Clone
Engine: 305 TPI
Transmission: T5
Axle/Gears: 3.23 Rear Disc
Re: Cheap Proportioning Valve Upgrade

Originally Posted by chazman View Post
Awesome! Thanks man. Got any more springs that you can sell?

I've got one 1NCF2 left. $2 shipped

Paypal: [email protected]***.net

LMK,

RT
Arvizu9618 is offline  
Old 05-25-2012, 04:21 AM
  #98  
Member
iTrader: (1)
 
Join Date: Dec 2001
Location: Finland
Posts: 427
Car: 1985 Camaro Z-28
Engine: 385
Transmission: th700r4+Edge 2800 stall
Axle/Gears: 3.42
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
Mod works for me, that's all I can add

I'm confident Jari in Finland will say the same when he gets the springs I just mailed him.
I will post results after I have measured brake line pressures with original, and stiffer spring.
z 28 jari is offline  
Old 05-25-2012, 07:49 AM
  #99  
Moderator
iTrader: (5)
 
JamesC's Avatar
 
Join Date: Aug 1999
Location: Lawrence, KS
Posts: 19,095
Car: Met. Silver 85 IROC
Engine: 350 HO Deluxe (350ci/330hp)
Transmission: T-5 (Non-WC)
Axle/Gears: Limited Slip 3.23's
Re: Cheap Proportioning Valve Upgrade

Originally Posted by z 28 jari View Post
I will post results after I have measured brake line pressures with original, and stiffer spring.
Excellent, as I'm interested in the effects of the spring swap.

JamesC
JamesC is offline  
Old 05-25-2012, 07:08 PM
  #100  
Member
iTrader: (12)
 
Join Date: Sep 2009
Location: Norwalk, CA
Posts: 452
Car: 1983 Z-28
Engine: 5.7 L
Transmission: T-5
Re: Cheap Proportioning Valve Upgrade

Originally Posted by Arvizu9618 View Post
It would go inside the vertical chamber. The circled portion of your pic. The plug/fitting req's a 3/4" wrench.

I have a 83 camaro but mine doesn't have the chamber there it has it on the end pointing to the driver side. I'll try to post a picture later on. And I can't give results just yet because I'm replacing my lifters...:/..
83C_CamAroZ28 is offline  

Thread Tools
Search this Thread
Quick Reply: Cheap Proportioning Valve Upgrade


Advertising
Featured Sponsors
Vendor Directory

Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: